Guitar



FIG. 1 is a front view of a guitar showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is an enlarged top view thereof;

FIG. 6 is an enlarged bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines are for illustrative purposes only and do not form part of the claimed invention. 

The ornamental design for a guitar, as shown and described. 